The call on line 1120 looks suspicious, because qtd could be non-null but also not a valid element, if the loop has exited normally.
julia On Sat, 19 Dec 2015, kbuild test robot wrote: > CC: kbuild-...@01.org > In-Reply-To: > <c123b5df7c51a27f33f0d423bf4752a221559fd1.1450455486.git.geliangt...@163.com> > TO: Geliang Tang <geliangt...@163.com> > CC: John Youn <johny...@synopsys.com>, Greg Kroah-Hartman > <gre...@linuxfoundation.org> > CC: Geliang Tang <geliangt...@163.com>, linux-...@vger.kernel.org, > linux-kernel@vger.kernel.org > > Hi Geliang, > > [auto build test WARNING on usb/usb-testing] > [also build test WARNING on v4.4-rc5 next-20151218] > > url: > https://github.com/0day-ci/linux/commits/Geliang-Tang/usb-host-fotg210-use-list_for_each_entry_safe/20151219-003955 > base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git > usb-testing > :::::: branch date: 2 hours ago > :::::: commit date: 2 hours ago > > >> drivers/usb/dwc2/hcd_ddma.c:1119:11-14: ERROR: invalid reference to the > >> index variable of the iterator on line 1096 > > git remote add linux-review https://github.com/0day-ci/linux > git remote update linux-review > git checkout 61366173f3eb9bee0d5cd22e6a7c5407b14087cb > vim +1119 drivers/usb/dwc2/hcd_ddma.c > > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 1090 > if (chan->halt_status == DWC2_HC_XFER_URB_DEQUEUE) { > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 1091 > list_for_each_entry(qtd, &qh->qtd_list, qtd_list_entry) > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 1092 > qtd->in_process = 0; > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 1093 > return; > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 1094 > } > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 1095 > 61366173 drivers/usb/dwc2/hcd_ddma.c Geliang Tang 2015-12-19 @1096 > list_for_each_entry_safe(qtd, tmp, &qh->qtd_list, qtd_list_entry) { > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 1097 > int i; > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 1098 > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 1099 > xfer_done = 0; > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 1100 > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 1101 > for (i = 0; i < qtd->n_desc; i++) { > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 1102 > if (dwc2_process_non_isoc_desc(hsotg, chan, chnum, qtd, > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 1103 > desc_num, halt_status, > fbd1cd20 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-11-22 1104 > &xfer_done)) { > fbd1cd20 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-11-22 1105 > qtd = NULL; > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 1106 > break; > fbd1cd20 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-11-22 1107 > } > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 1108 > desc_num++; > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 1109 > } > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 1110 > } > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 1111 > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 1112 > if (qh->ep_type != USB_ENDPOINT_XFER_CONTROL) { > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 1113 > /* > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 1114 > * Resetting the data toggle for bulk and interrupt endpoints > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 1115 > * in case of stall. See handle_hc_stall_intr(). > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 1116 > */ > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 1117 > if (halt_status == DWC2_HC_XFER_STALL) > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 1118 > qh->data_toggle = DWC2_HC_PID_DATA0; > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 @1119 > else if (qtd) > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 1120 > dwc2_hcd_save_data_toggle(hsotg, chan, chnum, qtd); > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 1121 > } > dc4c76e7 drivers/staging/dwc2/hcd_ddma.c Paul Zimmerman 2013-03-11 1122 > > :::::: The code at line 1119 was first introduced by commit > :::::: dc4c76e7b22cdcc1ba71ff87edee55f464e01658 staging: HCD descriptor DMA > support for the DWC2 driver > > :::::: TO: Paul Zimmerman <paul.zimmer...@synopsys.com> > :::::: CC: Greg Kroah-Hartman <gre...@linuxfoundation.org> > > --- > 0-DAY kernel test infrastructure Open Source Technology Center > https://lists.01.org/pipermail/kbuild-all Intel Corporation > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
